Thermador PH36GS Design Guide - Ventilation - Page 11

Equivalent Duct Lengths For Commonly, Used Transitions - parts

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Equivalent DUCT LENGTHS FOR COMMONLY USED TRANSITIONS DUCT piece Smooth Straight 3 1/4" x 10" Straight 3 1/4" x 14" Straight 90° Elbow Round 45° Elbow Round 3 1/4" x 10" 90° Elbow Round 3 1/4" x 10" 45° Elbow Round 3 1/4" x 10" Flat Elbow Round to 3 1/4" x 10" 3 1/4" x 10" to Round Round to 3 1/4" x 10" 90° Elbow SIZE of duct EQUIVALENT piece (In.) length (ft.) 6 1.2 7 0.95 8 0.7 10 0.6 N/A 1 N/A 0.7 6 12 7 8 8 6 6 5 7 4 8 3 N/A 5 N/A 15 N/A 20 6 1 7 1 6 5 7 3 6 10 7 8 DUCT piece SIZE of duct EQUIVALENT piece (In.) length (ft.) 3 1/4" x 10" 6 10 to Round 90° Elbow 7 5 3 1/4" x 10" Center Reverse N/A 15 Elbow Left 3 1/4" x 10" Center Reverse N/A 25 Elbow Right 3 1/4" x 10" Left Reverse Elbow N/A 15 3 1/4" x 10" Right Reverse N/A 25 Elbow 6 2 Round Wall Cap 7 2 8 2 10 2 Round Roof Cap 6 2 7 2 8 2 2' Long 3 1/4" x 10" N/A 20 Flex 3 1/4" x 10" to Round 10 1 7" Inline Backdraft 7 Damper 3 1/4" x 10" Roof Jack N/A and Shutter NOTE: These commonly used installation parts can be purchased at a local hardware store. Thermador does not manufacture all these parts. 138

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138
DUCT PIECE
SIZE OF DUCT
PIECE (IN.)
EQUIVALENT
LENGTH (FT.)
Smooth
Straight
6
1.2
7
0.95
8
0.7
10
0.6
3
1
/
4
" x 10"
Straight
N/A
1
3
1
/
4
" x 14"
Straight
N/A
0.7
90° Elbow
Round
6
12
7
8
8
6
45° Elbow
Round
6
5
7
4
8
3
3
1
/
4
" x 10"
90° Elbow
Round
N/A
5
3
1
/
4
" x 10"
45° Elbow
Round
N/A
15
3
1
/
4
" x 10"
Flat Elbow
N/A
20
Round to
3
1
/
4
" x 10"
6
1
7
1
3
1
/
4
" x 10"
to Round
6
5
7
3
Round to
3
1
/
4
" x 10"
90° Elbow
6
10
7
8
DUCT PIECE
SIZE OF DUCT
PIECE (IN.)
EQUIVALENT
LENGTH (FT.)
3
1
/
4
" x 10"
to Round
90° Elbow
6
10
7
5
3
1
/
4
" x 10"
Center Reverse
Elbow Left
N/A
15
3
1
/
4
" x 10"
Center Reverse
Elbow Right
N/A
25
3
1
/
4
" x 10" Left
Reverse Elbow
N/A
15
3
1
/
4
" x 10"
Right Reverse
Elbow
N/A
25
Round
Wall Cap
6
2
7
2
8
2
10
2
Round
Roof Cap
6
2
7
2
8
2
2' Long
3
1
/
4
" x 10"
Flex
N/A
20
3
1
/
4
" x 10"
to Round
10
1
7" Inline
Backdraft
Damper
7
3
1
/
4
" x 10"
Roof Jack
and Shutter
N/A
NOTE:
These commonly used installation parts can be purchased
at a local hardware store. Thermador does not manufacture all
these parts.
EQUIVALENT DUCT LENGTHS FOR COMMONLY
USED TRANSITIONS